Machine for planing key-grooves.



PATENTED JAN. 20, 1903.

RRBGNER. MACHINE FOR PLANING KEY enoovns.

APPLICATION FILED DEG, 22, 1899.

s SHEETS-SHEET 1.

no MODEL.

PATENTED JAN. '20, 1903.

F. REGNER. MACHINE FOR PLANING KEY GROOVES.

APPLICATION FILED DEC]. 22', 1899.-

3 SHEETS-SHEET 2.

N0 MODEL.

m a PM w 'mznrmms PETERS ca. Punrouwa, wAsmNnmN. n. z.

No. 718,728. PATENTED JAN. Z0.,1903.

. F. REGNER.

MACHINE FOR PLANING KEY (moovns.

APPLICATION FILED DEC. 22, 1899.

no MODEL. 3 SHEETS-SHEET a.v

FlG?) Witness Inventor.

UNITED STATES PATENT OFFICE.

FRANZ REGNER, OF PFERSEC, NEAR AUGSBURG, GERMANY.

MACHINE FQR PLANING KEY-GROOVES.

SPECIFICATION formingpart of Letters Patent No. 718.7 28, dated January 20, 1903.

Application filed December 22,1899. $erial No. '74] ,261. (No model.)

T at whom, it Wtcty concern.-

Be it known that I, FRANZ REGNER, a subject of the German Emperor, and a resident of Pfersec, near Augsburg, Germany, have invented certain new and useful Improvements in Machines for Planing Key-Grooves,

of which the following is a specification.

The object of my invention is to provide an improved machine for planing key-grooves which may be actuated by hand or machine power and which is especially adapted for planing keyways in the hubs of pulleys.

In the accompanying drawings, which form a part of this application, Figure 1 is a side elevation of my improved machine. Fig. 2 is a top plan view of the same. Fig. 3 is a front elevation of the improved planer. Fig. 4 is a front elevation of the lower part of the disk for holding the piece to be planed, and Fig. 5 is a sectional and a side view of the rack-bar.

Referring to the drawings in detail, 1 represents the bed-plate of my improved machine, in which a dovetail-shape guideway is provided for the table 2, which is slidably mounted therein. The carriage carries the tool-holder 3, which is swingingly journaled on the pivot t between two supports connected with the carriage. The longer or lefthand arm of said holder is journaled in a suitable opening in the verticallymoving slide or frame 6 at the left-hand end of the carriage and has connected therewith a screwspindle 5, by which it is vertically adjusted. The carriage is provided in its under side with a dovetail-shaped guideway for a slidable rack-bar 7, the end 8 of which projects obliquely and engages an opening in the slide 6, which is raised thereby or lowered in the reciprocating movement of the rack bar. The shoulder 50, Fig. 9, on the extension 8 of the rack-bar engages the slide 6, and thereby moves the carriage in one direction-40 the left--and the shoulder 51 of the extension directly engages the carriage in the move ment of the rack-bar to the right, whereby the carriage is moved in the same direction. In the latter movement the lower face of the extension 8 moves the slide 6 downwardly, and when said bar moves to the left the slide is lifted by the upper face of the extension. The motion of the slide 6 is transmitted to the tool-holder 3 in such manner that in the downward movement the tool 9 is pressed against the piece to be planed, which is secured to the disk 10, and in the upward movement the tool is disengaged from said piece. After the extension 8 has caused either of the described movements it carries in the movement of the rack-bar the slide 6 and the carriage 2 and also the tool-holder 3 forward or backward, as the case may be.

The machineis driven from the shaft 12 by a crank 13 or by belt 14:. The shaft is provided with a pinion 15, engaging with the pinion 16 and gear-wheel 17 on the shafts 18 and 19, respectively. The pinion 20 on shaft 18 and pinion 21 on shaft 19 engage the rackbar 7 at the forward or backward motions, respectively, of same, and thereby the carriage 2, with the tool 9, is reciprocated, as described above. The pinions 20 and 21, as well as the clutches 22 and 23, are loose on their respective shafts 18 and 19. The clutches are made in two parts and are provided with sufficient play in engaging the pinions 20 and 21, so that the clutch of the gear which has been in action will be disengaged before the other gear is engaged by its clutch. v I

The clutches 25 and 26 on the shafts 18 and 19 are slidingly operated by forks 24:, which are connected by double-armed lever 27 the central part of which is mounted on the eccentric-shaft 28, journaled in a lateral projection of the bed-plate of the machine. The lever 27 is provided with a radial projection 29, engaging the side of wedge 30, which is carried by a spring 30, fastened to the bedplate of the machine, whereby one arm of the lever 27 and clutches 25 or 26 are held out of engagement, and when the eccentric-shaft 28 is turned inwardly one hundred and eighty degrees by the eccentric-disk through lever 31 the clutches 25 and 26 are slid into engagement with clutches 22 and 23. At the side of the carriage 2 two stops 32 and 33 are provided, which are slidably mounted in dovetail grooves and held in position by screwbolts at a desired distance, according to the length of the keyway to be planed.

In starting the work the shaft 19 is coupled with the pinion 21 by shifting the clutch 26 by means of lever 27, the projection 29 of the shaft 28, and the wedge 30, as described. Then the main shaft 12 is set rotating, and the pinion 21 will move the rack-bar 7 to the right. In this movement the extension 8 of the rackbar moves the slide 6 down, and the tool 9 is pressed against the'piece to be planed, and the rack-bar by means of the carriage and the tool-holder 3 moves the tool along the bore of said piece. When a chip of the desired length is cut away, the arm 34, which is fastened to the eccentric-shaft 28 parallel to the projection 29, is caught by the stop 33, and thereby pushes back the spring fastened to the bed-plate, and the projection 29 flies to the other side of the wedge 30, and thereby disengages the clutch 26 and causes the clutch to slide and the pinion 20 to engage with the rack-bar 7,which is now moved backward, while the main shaft 12 rotates in the same direction as before.

The carriage causes the tool 9 to be moved automatically the thickness of one chip by the following device: The ratchet-wheel 35, mounted on the screw-spindle 5 above the slide 6, is engaged by a pawl fastened to the loosely-mounted lever 36, which is engaged by a rod 37, journaled at its free end in a support 38,,connected with the carriage, and is slidingly mounted in a support 40, fastened to the bed-plate of the machine. The stopring 39, which is adjustably fastened to said rod 37, strikes and is held up in the back motion of the carriage by the support 40. The

further motion of the carriage causes the lever 36 to be rotated, whereby the ratchetwheel is turned and the spring 41 at the end of the rod 37 is wound. Near the end of the back motion of the carriage 2 the arm 34 strikes against the stop 32 and by means of the projection 29 and wedge 30 causes the disengagement of the clutch 22 25 and the engagement of the clutch 23 26. In the forward motion of the carriage the extension 8 of the rack-bar causes again the tool to be pressed against the piece to be planed while the tool is moved forward. The rod 37, with the stop-ring 39, moves in the same direction ciprocatingly mounted on said frame, a rack bar slidingly mounted on said carriage and provided at one end with the angular projection 8, a slide 6 vertically mounted on the carriage and having an angular passage through which the projection 8 passes, a tool-holder pivotally mounted on the carriage and adjustably connected at one end to the slide, shoulders on the rack which engage with abutments on the carriage, and means to reciprocate the rack, whereby the slide will be movedvertically at each change of direction of movement of the rack prior to the movement of the carriage, so that the tool-holder will be rocked on its pivot at the end of each stroke.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

FRANZ REGNER. Witnesses:

M. FORNOR, EDUARD ZAERGER. 

